Templates are read-only blanks. Workflow: copy a template → fill the copy in filled-instances/ → never edit the blank.
filled-instances/
1. Click "Copy command" on any template card.
2. Paste the command in your terminal at the mirror repo root.
3. The blank template copies to filled-instances/ — fill that copy, not the original.
4. Commit your filled copy. The blank stays untouched (it'll be re-synced from engine if anything changes).
If you want a new template, file an issue: new template request